Former California Gov. Arnold Schwarzenegger arrives at a funeral for former President George H.W. Bush at St. Martin's Episcopal Church Thursday, Dec. 6, 2018, in Houston. (AP Photo/Gerald Herbert)

Members of the Oak Ridge Boys arrive for a funeral service for former President George H.W. Bush at St. Martin's Episcopal Church Thursday, Dec. 6, 2018, in Houston. (AP Photo/David J. Phillip, Pool)

The Oak Ridge boys sing "Amazing Grace" during a funeral service for former President George H.W. Bush at St. Martin's Episcopal Church Thursday, Dec. 6, 2018, in Houston. (AP Photo/David J. Phillip, Pool)

The Oak Ridge boys sing "Amazing Grace" during a funeral service for former President George H.W. Bush at St. Martin's Episcopal Church Thursday, Dec. 6, 2018, in Houston. (AP Photo/David J. Phillip, Pool)

The Oak Ridge boys sing "Amazing Grace" during a funeral service for former President George H.W. Bush at St. Martin's Episcopal Church Thursday, Dec. 6, 2018, in Houston. (AP Photo/David J. Phillip, Pool)

Reba McEntire sings "The Lord's Prayer" during a funeral service for former President George H.W. Bush at St. Martin's Episcopal Church Thursday, Dec. 6, 2018, in Houston. (AP Photo/David J. Phillip, Pool)

Reba McEntire arrives for a funeral service for former President George H.W. Bush at St. Martin's Episcopal Church Thursday, Dec. 6, 2018, in Houston. (AP Photo/David J. Phillip, Pool)

Reba McEntire sings "The Lord's Prayer" during a funeral service for former President George H.W. Bush at St. Martin's Episcopal Church Thursday, Dec. 6, 2018, in Houston. (AP Photo/David J. Phillip, Pool)

HOUSTON (AP) — Reba McEntire has sung "The Lord's Prayer" at the Houston funeral service of former President George H.W. Bush.

The Grammy winner on Thursday followed the Oak Ridge Boys, who were one of the president's favorite musical acts and who sang "Amazing Grace" during the service at St. Martin's Episcopal Church in Houston.

Celebrities, including actor-politician Arnold Schwarzenegger, were among the mourners at the church where the Bush family worships. Thursday's ceremony was final public farewell to the 41st president.

Bush will be buried during a private service later Thursday at his family plot on the Bush presidential library grounds at Texas A&M University in College Station.